Power tool adaptor and a reversible tool bit holder adaptor for a power tool adaptor

Abstract

A power tool adaptor for holding a tool adapted thereto including an adaptor body, a tool insertion cavity formed in an end of the adaptor body for receiving the tool, an elongated tool bit insertion cavity formed as a continuation of the tool insertion cavity, means for fixating the tool by protruding into one or more fixation recesses on the outer surface of the tool and means for attaching the power tool adaptor to a power tool; a reversible tool bit holder is further disclosed for holding two changeable tool bits, which reversible tool bit holder is adapted to fit into the power tool adaptor, along with a kit including a power tool adaptor and a reversible tool bit holder adapted to fit into the power tool adaptor.

The invention claimed is: 
     
       1. A kit comprising:
 a power tool adaptor for holding a tool, said adaptor comprising:
 an adaptor body; 
 a tool insertion cavity formed in a first end of the adaptor body for receiving the tool, 
 an elongated tool bit insertion cavity formed as a continuation of the tool insertion cavity, 
 means for releasably fixating the tool inserted in the tool insertion cavity at least in a longitudinal direction of the power tool adaptor, and 
 means for attaching the power tool adaptor to a power tool, 
 wherein the tool insertion cavity is cylindrical, and wherein the tool bit insertion cavity is hexagonal and capable of rotationally locking a tool bit inserted therein to the power tool adaptor with the longitudinal centre axis of the tool bit coinciding with the longitudinal centre axis of the power tool adaptor, wherein the hexagonal tool bit insertion cavity is disposed in continuation with the cylindrical tool insertion cavity and extends from a closed end thereof; and 
 
 a reversible tool bit holder, comprising: 
 an elongated bit holder body, 
 an elongated tool bit insertion cavity formed in each of the two ends of the bit holder body, each of which tool bit insertion cavities is capable of rotationally locking a tool bit inserted therein to the bit holder body with the longitudinal centre axis of the tool bit coinciding with the longitudinal centre axis of the bit holder body, and 
 means for fixating a tool bit in each of the tool bit insertion cavities, 
 wherein the bit holder body further comprises 
 
       one or more bit holder fixation recesses formed in the outer surface of the bit holder body for being used to fixate the reversible tool bit holder in a power tool adaptor
 wherein the bit holder body of the reversible tool bit holder is adapted to fit into the tool insertion cavity of the power tool adaptor, and the power tool adaptor is rotationally locked to the reversible tool bit holder by means of a tool bit inserted in the tool bit insertion cavities of the power tool adaptor and the reversible tool bit holder. 
 
     
     
       2. The kit according to  claim 1 , wherein a cross-sectional dimension of the tool insertion cavity is between 4 mm and 20 mm. 
     
     
       3. The kit according to  claim 1 , wherein an outer cross-sectional dimension of an adaptor head is between 10 mm and 26 mm. 
     
     
       4. The kit according to  claim 1 , wherein the means for fixating the tool inserted in the tool insertion cavity comprises one or more tool fixation elements, each being positionable in at least two different positions, a first position of which causes the tool fixation element to protrude into a fixation recess on the surface of the tool inserted in the tool insertion cavity, and a second of which causes the tool fixation element not to protrude into such a recess. 
     
     
       5. The kit according to  claim 4 , wherein at least one of the tool fixation elements is a spring-loaded ball or a spring-loaded pin. 
     
     
       6. The kit according to  claim 4 , wherein the position of at least one of the tool fixation elements is controlled by means of a slidable adaptor sleeve comprising one or more fixation element recesses in such a way that, when the tool fixation element is aligned with a fixation element recess, it is allowed to be in the second position, whereas, when the tool fixation element is not aligned with a fixation element recess, the tool fixation element is kept in the first position, thus fixating the tool at least in the longitudinal direction thereof. 
     
     
       7. The kit according to  claim 1 , further comprising means for releasably fixating a tool bit inserted in the tool bit insertion cavity at least in a longitudinal direction of the tool bit. 
     
     
       8. The kit according to  claim 7 , wherein the means for releasably fixating a tool bit inserted in the tool bit insertion cavity comprises a permanent magnet arranged at the closed end of a tool bit insertion cavity. 
     
     
       9. The kit according to  claim 7 , wherein the means for releasably fixating a tool bit inserted in the tool bit insertion cavity comprises one or more tool bit fixation elements, each being positionable in at least two different positions, a first position of which causes the tool bit fixation element to protrude into a tool bit fixation recess of a tool bit, and a second of which causes the tool bit fixation element not to protrude into such a recess. 
     
     
       10. The kit according to  claim 9 , wherein at least one of the tool bit fixation elements is a spring-loaded ball or a spring-loaded pin. 
     
     
       11. The kit according to  claim 9 , wherein the position of at least one of the tool bit fixation elements is controlled by means of a slidable adaptor sleeve comprising one or more fixation element recesses in such a way that, when the tool bit fixation element is aligned with a fixation element recess, it is allowed to be in the second position, whereas, when the tool bit fixation element is not aligned with a fixation element recess, the tool bit fixation element is kept in the first position, thus fixating the tool bit at least in the longitudinal direction thereof. 
     
     
       12. The kit according to  claim 1 , wherein the means for attaching the power tool adaptor to a power tool comprises a first attachment part arranged at a second end of the adaptor body and having cross-sectional shape and dimensions suitable for being mounted in a common drill chuck. 
     
     
       13. The kit according to  claim 12 , wherein a cross-section of the first attachment part has a hexagonal shape. 
     
     
       14. The kit according to  claim 12 , wherein the first attachment part has a cross-sectional dimension of between 8 mm and 15 mm. 
     
     
       15. The kit according to  claim 12 , further comprising a second attachment part having cross-sectional shape and dimensions suitable for being mounted in a common quick-release lock of a power drill tool. 
     
     
       16. The kit according to  claim 15 , wherein a cross-section of the second attachment part has a hexagonal shape. 
     
     
       17. The kit according to  claim 15 , wherein the second attachment part has a cross-sectional dimension of between 5 mm and 7 mm. 
     
     
       18. The kit according to  claim 15 , wherein the second attachment part further comprises one or more attachment part fixation recesses by means of which the second attachment part may be fixated at least in the longitudinal direction when inserted in a quick-release lock. 
     
     
       19. A reversible tool bit holder according to  claim 1 , wherein, each of which tool bit insertion cavities is hexagonal, and the bit holder body is cylindrical. 
     
     
       20. A reversible tool bit holder according to  claim 19 , wherein an outer cross-sectional dimension of the bit holder body is between 4 mm and 20 mm. 
     
     
       21. A reversible tool bit holder according to  claim 19 , wherein the cross-sectional shape of the tool bit insertion cavities is hexagonal. 
     
     
       22. A reversible tool bit holder according to  claim 19 , wherein the means for fixating a tool bit comprises a permanent magnet arranged at the closed end of a tool bit insertion cavity. 
     
     
       23. A reversible tool bit holder according to  claim 19 , wherein the means for fixating a tool bit comprises a locking ring arranged in a tool bit insertion cavity to interact with a fixation recess, in a tool bit. 
     
     
       24. A reversible tool bit holder according to  claim 19 , which is provided with a slidable dividing wall between the closed ends of the two tool bit insertion cavities allowing a tool bit inserted in one tool bit insertion cavity to be inserted deeper into the reversible tool bit holder, while forcing a larger part of a tool bit inserted in the other tool bit insertion cavity to protrude from the reversible tool bit holder. 
     
     
       25. A reversible tool bit holder according to  claim 19 , wherein the one or more bit holder fixation recesses comprise one or more substantially circular depressions in the outer surface of the bit holder body.